A man faces two counts of intoxication assault with a vehicle after two motorcycles collided early Sunday east of Crosby.

Sherry Walter was seated behind Raymond Walter Sr., 46, as he drove a 1986 Suzuki Intruder motorcycle west in the 2000 block of Krenek when the incident occurred shortly after 3 a.m., according to a press release from the Harris County Sheriff's office.

Linda Quartz was seated behind Raymond Walter Jr. as he drove a 1996 Suzuki Intruder in front of the other couple.

The elder Walter failed to control his speed and hit the rear of the other motorcycle, throwing both Quartz and Sherry Walter off the bikes, according to authorities.

Quartz sustained serious injuries and was transported to LBJ hospital. Sherry Walter's injuries were described as life-threatening and she was transported via Lifeflight to Memorial Hermann Hospital.

The elder Walter was charged after he was found to be intoxicated, according to the release. Records show he has no prior criminal history in Harris County and he is out on bond, which was set at $10,000 for the first charge and $30,000 for the second.

The case remains under investigation by the Harris County Sheriff's Office Traffic Enforcement Division.